The invention discloses a disassembling tool, and provides a tool for disassembling a welding electrode tip. According to the tool, the electrode tip can be conveniently and rapidly disassembled under the condition that the a welding device is not damaged, the technical problems that in the prior art, the electrode tip disassembling and replacing processes waste time and labor and are low in efficiency and prone to damaging the welding device, and therefore the service life of the welding device is shortened are solved. The tool comprises a machine shell and a handle arranged at one end of the machine shell, a motor is arranged in the machine shell, a machine head cover shell is connected to the other end, corresponding to the end where the handle is arranged, of the machine shell, an electrode tip clamping opening is formed in the machine head cover shell, a plurality of clamping jaws capable of clamping the electrode tip are arranged in the position, corresponding to the electrode tip clamping opening, of the machine head cover shell, and the clamping jaws are connected with an output shaft of the motor through a transmission mechanism and drive the electrode tip to forwards and backwards rotate.